CVE-2023-39988 in WxSync Plugin
Summary
by MITRE • 09/04/2023
Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in 标准云(std.Cloud) WxSync plugin
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Analysis
by VulDB Data Team • 09/08/2023
The CVE-2023-39988 vulnerability represents a stored cross-site scripting flaw within the WxSync plugin for std.Cloud, a platform that appears to be a content management or collaboration system. This security weakness affects users with contributor privileges or higher, indicating that authenticated attackers can exploit this issue to inject malicious scripts into the application's data storage. The vulnerability's classification as stored XSS means that the malicious payload persists in the system and can affect other users who view the compromised content, making it particularly dangerous in collaborative environments where multiple users interact with shared data.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization within the WxSync plugin's data handling mechanisms. When contributors or higher-privileged users submit content through the plugin interface, the system fails to properly sanitize user-supplied data before storing it in the database. This allows malicious actors to embed script tags or other malicious code within the content that gets executed when other users view the affected pages. The flaw likely occurs in the plugin's handling of user-generated content, particularly in fields that support rich text or HTML input without proper sanitization measures.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and privilege escalation within the affected system. Since the vulnerability affects users with contributor privileges or higher, attackers could potentially compromise sensitive content, manipulate shared resources, or gain access to restricted areas of the platform. The stored nature of the vulnerability means that the malicious scripts can affect multiple users over time, making it a persistent threat that could remain undetected for extended periods.
Organizations should implement immediate mitigations including input validation and output encoding controls within the WxSync plugin to prevent script injection attempts. The solution requires proper sanitization of all user-supplied content before storage, implementing Content Security Policy headers, and conducting regular security audits of plugin components. This vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and represents a significant concern from an attacker's perspective as it can be leveraged to establish persistent access to the platform. Organizations should also consider implementing web application firewalls, monitoring for suspicious content patterns, and conducting user education on recognizing potential XSS attack vectors within collaborative environments. The ATT&CK framework categorizes this as a code injection technique under the T1566 tactic, emphasizing the need for robust input validation and output encoding controls to prevent exploitation.